Stadium: Court 9 Round: 54 Ground: Clay
| ITF W25 Tucuman | 2023/02/28 14:55 | Katja Markus v Carla Markus | 1-6,5-7 |
| ITF W25 Tucuman | 2022/10/10 17:00 | Katja Markus v Carla Markus | 2-6,0-6 |
| ITF W15 Rosario | 2023/06/27 12:00 | Katja Markus v Michela Castro Zunino | 3-6,2-6 |
| ITF W15 Buenos Aires | 2023/06/19 13:30 | Katja Markus v Michela Castro Zunino | 7-6,1-6,3-10 |
| ITF W15 Recife | 2023/05/24 17:50 | Katja Markus v Alessandra Caceres | 4-6,4-6 |
| ITF W15 Curitiba | 2023/05/16 13:00 | Katja Markus v Isabel Oliveira | 7-5,1-6,8-10 |
| ITF W15 Curitiba | 2023/05/15 16:00 | Katja Markus v Bianca G Lampert | 4-6,6-0,10-4 |
| ITF W25 Guayaquil Qual | 2023/04/23 19:25 | Amanda C Nava Elkin v Katja Markus | 6-0,6-0 |
| ITF W25 Guayaquil | 2023/04/16 15:00 | Katja Markus v Ena Koike | 0-6,0-6 |
| ITF W25 Tucuman | 2023/02/28 14:55 | Katja Markus v Carla Markus | 1-6,5-7 |
| ITF W15 Rosario | 2023/06/30 14:45 | Carla Markus v Maria F Urrutia | 3-6,3-6 |
| ITF W15 Rosario | 2023/06/29 15:05 | Carla Markus v Jade Haller | 2-6,7-6,6-1 |
| ITF W15 Rosario | 2023/06/27 13:30 | Carla Markus v Nicole Poj | 6-1,6-2 |
| ITF W15 Buenos Aires | 2023/06/20 15:00 | Marina Bulbarella v Carla Markus | 7-5,6-2 |
| ITF W15 Recife | 2023/05/24 13:30 | Paola Ueno Dalmonico v Carla Markus | 7-5,6-7,6-2 |
| ITF W15 Curitiba | 2023/05/18 18:15 | Josefina Estevez v Carla Markus | 6-1,6-2 |
| ITF W15 Curitiba | 2023/05/17 17:00 | Carla Markus v Isabel Oliveira | 4-6,6-2,7-5 |
| ITF W25 Guayaquil | 2023/04/26 21:20 | Carla Markus v Marine Partaud | 1-6,1-6 |